I have four scopes with MSR reticles on various different rifles: 3 S&B and 1 Kahles. Love 'em all. As soon as the newer MSR-2 is available, I am going to switch it in to my 5-25x56 PMII which sits on my .338 LM, so I'll have 5, if all goes according to plan.
For reticle range estimation, which PRS matches just don't seem to do, they are the bomb. PRS is not the be all and end all of precision rifle competition, and for some others, PRS rifle comps are not the be all and end all of owning, using, and shooting rifles (read: real soldiers, not me....).
Lotsa PRS guys like some sort of Christmas tree reticle for the frequent sick stages of 90 seconds where your have to engage 10 targets positional at different ranges with no time to dial. The guys who excel at this have teriffic skills, acquired by lotsa training, but to me, meh, BFD. If this is your game, the get a Horus, or a Shannon Kay Kahles, not an MSR....
Just my $0.02